just got her running ........using the stock bore this is a nice easy big cc mini motor we are prototyping for Pitster......with our g2 cam and a mild head this thing yanks away from a std. 125cc like it was standing still. Now we are @ 5 pm so i can dyno this beast GPX . dyno runs will be up tommorow.It sounds like our 160 cc KLX .....braaaap!!!!